Spring笔记（1）（IOC容器_bean管理xml_注入属性（基本+空值+特殊符号））

摘要：（set方式+有参构造）（了解：P名称空间注入）

bean1.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--1 配置User对象创建-->
    <!--<bean id="user" class="com.atguigu.spring5.User"></bean>-->

    <!--2 set方法注入属性-->
    <bean id="book" class="com.atguigu.spring5.Book">
        <!--使用property完成属性注入
            name：类里面属性名称
            value：向属性注入的值
        -->
        <property name="bname" value="易筋经"></property>
        <property name="bauthor" value="达摩老祖"></property>
        <!--null值-->
        <!--<property name="address">
            <null/>
        </property>-->

        <!--属性值包含特殊符号
            1 把<>进行转义 &lt; &gt;
            2 把带特殊符号内容写到CDATA
        -->
        <property name="address">
            <value><![CDATA[<<南京>>]]></value>
        </property>
    </bean>

    <!--3 有参数构造注入属性-->
    <!--<bean id="orders" class="com.atguigu.spring5.Orders">
        <constructor-arg name="oname" value="电脑"></constructor-arg>
        <constructor-arg name="address" value="China"></constructor-arg>
    </bean>-->

    <!--2 set方法注入属性-->
    <!--<bean id="book" class="com.atguigu.spring5.Book" p:bname="九阳神功" p:bauthor="无名氏">
    </bean>-->
</beans>

testSPring5demo.java:

package com.atguigu.spring5.testdemo;

import com.atguigu.spring5.Book;
import com.atguigu.spring5.Orders;
import com.atguigu.spring5.User;
import org.junit.Test;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring5 {

    @Test
    public void testAdd() {
        //1 加载spring配置文件
        BeanFactory context =
                new ClassPathXmlApplicationContext("bean1.xml");

        //2 获取配置创建的对象
        User user = context.getBean("user", User.class);

        System.out.println(user);
        user.add();
    }

    @Test
    public void testBook1() {
        //1 加载spring配置文件
        ApplicationContext context =
                new ClassPathXmlApplicationContext("bean1.xml");

        //2 获取配置创建的对象
        Book book = context.getBean("book", Book.class);

        System.out.println(book);
        book.testDemo();
    }

    @Test
    public void testOrders() {
        //1 加载spring配置文件
        ApplicationContext context =
                new ClassPathXmlApplicationContext("bean1.xml");

        //2 获取配置创建的对象
        Orders orders = context.getBean("orders", Orders.class);

        System.out.println(orders);
        orders.ordersTest();
    }
}